commit bash-20090409 snapshot

expr.c

@@ -202,7 +202,7 @@ static int expr_depth;		   /* Location in the stack. */
 static int expr_stack_size;	   /* Number of slots already allocated. */
 
 extern char *this_command_name;
-extern int unbound_vars_is_error;
+extern int unbound_vars_is_error, last_command_exit_value;
 
 #if defined (ARRAY_VARS)
 extern const char * const bash_badsub_errmsg;
@@ -923,6 +923,7 @@ expr_streval (tok, e)
       value = tok;
 #endif
 
+      last_command_exit_value = EXECUTION_FAILURE;
       err_unboundvar (value);
 
 #if defined (ARRAY_VARS)